http://detnews.com/article/20110507/...-sends-message

These guys claim they are making Detroit a better place.

I would say "why not buy a building and spray paint it?".
But realistically these are the type of people who will never own any real estate. And by the time they do will no longer be interested in such a past-time.

Why not open a small space where people can watch artists do their spray work.
People are entertained and might even buy a 8 X 12ft. piece for their home.

Citizens are so disconnected from society and the fruits of their labor that some no longer understand that we need everyone's productive efforts to make the economy run.
These guys are doing the opposite of rehabbing buildings.
They are wasting or tarnishing their youth by committing crimes, spending time that could have been used on working, education, volunteering, mentoring, or having clean fun.

I would easily pay a few dollars to watch a building of spray artists create pieces.
And yes there is a low VOC spray paint for those wondering how realistic my idea is.